Ornithology. Also called water ouzel.any small, stocky diving bird of the family Cinclidae, related to the thrushes, esp. Cinclus aquaticus of Europe and C. mexicanus of western North America, having dense, oilyplumage and frequenting rapid streams and rivers.
5.
South Midland and Southern U.S.a person who uses snuff.
n. a drunkard. (From dipsomaniac.) : Buy the dip a drink. That'll shut him up for a while.
n. and dipper. a pickpocket. (Underworld.) : The dip tried a snatch, but the dupe turned around at the wrong time. , The cops picked up three dippers, working as a group, at the fairgrounds.
n. a pinch or helping of snuff. : He took a dip just before he picked up the bat.
n. a wad of chewing tobacco. : You could see he had a big dip in his cheek.
n. an oaf; a jerk. (Probably from dipshit.) : Why are you acting like such a dip?
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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[dip-er] 
) Astronomy.